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arXiv · 2211.10266

Two-photon decay of fully-charmed tetraquarks from light-by-light scattering at the LHC

Volodymyr Biloshytskyi·Lucian Harland-Lang·Bogdan Malaescu·Vladimir Pascalutsa·Kristof Schmieden·Matthias Schott
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Abstract

The LHC newly-discovered resonant structures around 7 GeV, such as the $X(6900)$, could be responsible for the observed excess in light-by-light scattering between 5 and 10 GeV. We show that the ATLAS data for light-by-light scattering may indeed be explained by such a state with the $\gamma \gamma$ branching ratio of order of $10^{-4}$. This is much larger than the value inferred by the vector-meson dominance, but agrees quite well with the tetraquark expectation for the nature of this state. Further light-by-light scattering data in this region, obtained during the ongoing Run-3 and future Run-4 of the LHC, are required to pin down these states in $\gamma\gamma$ channel.

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Volodymyr Biloshytskyi, Lucian Harland-Lang, Bogdan Malaescu, Vladimir Pascalutsa, Kristof Schmieden, Matthias Schott. 2022-11-18. Two-photon decay of fully-charmed tetraquarks from light-by-light scattering at the LHC. https://doi.org/10.1051/epjconf%2F202227406007

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